Question

Guys I’ve got this puzzling question.

I know that Tyndall effect makes path of light visible . But , in space there are no colloidal dispersed phase. Then theoretically shouldn’t the path of light not be visible ?

Also , if we were to create vacuum in a pitch dark room and on a flashlight would it’s path be visible ?

Plz help me I am confused

Answer 1

No, first of all we are not able to see the path of light in space.

We can just see the object, not it's projectile

Eg: Although we can see stars, we can't see it's path because there are no colloidal solutions in space.

And no, if we create vacuum in a pitch dark room, we won't be able to see the path of a lazer beam or torch.